Trader consensus has locked in 13°C as Shanghai's highest temperature on March 18, driven by converged forecasts from major models like ECMWF and GFS, which align with surface observations of a persistent cool air mass and cloudy conditions suppressing solar heating. Official data from the China Meteorological Administration corroborates this, showing daytime highs stabilizing around seasonal norms for mid-March (historical average ~12-14°C), with low wind shear limiting mixing from warmer layers aloft. Realistic challenges include an unforeseen clearing of overcast skies boosting insolation by 2-3°C or a stalled frontal boundary allowing southerly flow, though ensemble probabilities for such deviations remain below 5%, per current outlooks.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Shanghai on March 18?
Highest temperature in Shanghai on March 18?
13°C 100.0%
6°C or below <1%
7°C <1%
8°C <1%
$229,109 Vol.
$229,109 Vol.
6°C or below
No
7°C
No
8°C
No
9°C
No
10°C
No
11°C
No
12°C
No
13°C
Yes
14°C
No
15°C
No
16°C or higher
No
13°C 100.0%
6°C or below <1%
7°C <1%
8°C <1%
$229,109 Vol.
$229,109 Vol.
6°C or below
No
7°C
No
8°C
No
9°C
No
10°C
No
11°C
No
12°C
No
13°C
Yes
14°C
No
15°C
No
16°C or higher
No
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Shanghai Pudong International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/cn/shanghai/ZSPD.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Market Opened: Mar 14, 2026, 6:02 AM ET
Resolution Source
https://www.wunderground.com/history/daily/cn/shanghai/ZSPDResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Resolution Source
https://www.wunderground.com/history/daily/cn/shanghai/ZSPDResolver
0x69c47De9D...Trader consensus has locked in 13°C as Shanghai's highest temperature on March 18, driven by converged forecasts from major models like ECMWF and GFS, which align with surface observations of a persistent cool air mass and cloudy conditions suppressing solar heating. Official data from the China Meteorological Administration corroborates this, showing daytime highs stabilizing around seasonal norms for mid-March (historical average ~12-14°C), with low wind shear limiting mixing from warmer layers aloft. Realistic challenges include an unforeseen clearing of overcast skies boosting insolation by 2-3°C or a stalled frontal boundary allowing southerly flow, though ensemble probabilities for such deviations remain below 5%, per current outlooks.
Experimental AI-generated summary referencing Polymarket data · Updated
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